Marshmellows are fine, they are just sugar and gelatin. I roast mine (I don't like the sweetened ones in the can) until done, peel them, cut them up. I use maple syrup, (can use sugar free) cinnamon, brown sugar (Slenda has one too) and butter, I put pineapples on top and then cover with mini marshmellows and bake until brown. Its my family's favorite and so easy to make. You can bake the potatoes ahead of time, you can even make them in the microwave. I don't boil them because they absorb water. You can also add nuts if no ones alergic to them